PHP

laravel join

Inner Join 	: ->join('contacts', 'users.id', '=', 'contacts.user_id')
Left Join 	: ->leftJoin('posts', 'users.id', '=', 'posts.user_id')
Right Join 	: ->rightJoin('posts', 'users.id', '=', 'posts.user_id')
Cross Join 	: ->crossJoin('colors')

Advance Queries : 
----------------- 
 		->join('contacts', function ($join) {
            $join->on('users.id', '=', 'contacts.user_id')
                 ->where('contacts.user_id', '>', 5);
        })
  

left join in laravel

$data = DB::table('post')
  ->leftJoin('category', 'post.category', '=', 'category.id')
  ->leftJoin('users', 'post.author', '=', 'users.id')
  ->orderBy('created_at', 'DESC')
  ->get();

laravel join

$users = DB::table('users')
            ->join('contacts', 'users.id', '=', 'contacts.user_id')
            ->join('orders', 'users.id', '=', 'orders.user_id')
            ->select('users.*', 'contacts.phone', 'orders.price')
            ->get();

left join laravel

$users = DB::table('users')
            ->leftJoin('posts', 'users.id', '=', 'posts.user_id')
            ->get();

$users = DB::table('users')
            ->rightJoin('posts', 'users.id', '=', 'posts.user_id')
            ->get();

laravel join

$latestPosts = DB::table('posts')
                   ->select('user_id', DB::raw('MAX(created_at) as last_post_created_at'))
                   ->where('is_published', true)
                   ->groupBy('user_id');

$users = DB::table('users')
        ->joinSub($latestPosts, 'latest_posts', function ($join) {
            $join->on('users.id', '=', 'latest_posts.user_id');
        })->get();

laravel join

$query = DB::table('posts')
            ->select('posts.*',
                    'subcategories.subcategory_title_en',
                    'subcategories.subcategory_title_bn',
                    'categories.category_title_en',
                    'categories.category_title_bn',
                    'users.*',
                    'postimages.postimage_thumbnail'
                    )
            ->join('subcategories', 'subcategories.subcategory_id', '=', 'posts.subcategory_id')
            ->join('categories', 'categories.category_id', '=', 'subcategories.parent_category_id')
            ->join('users', 'users.id', '=', 'posts.user_id')
            ->join('postimages', 'postimages.post_id', '=', 'posts.post_id')->groupBy('posts.post_id');